Channelization Secondary Destinations: destinations targeted by the frames belonging to secondary ACs. There

3. Primary AC: the AC that wins the TXOP for channel access after both external and internal

competition. There is only one primary AC at any time.

4. Secondary AC: an AC that does not win a TXOP but wants to share the TXOP obtained by the

primary AC for simultaneous transmissions. There could be multiple secondary ACs at any time.

5. Primary Destinations: destinations targeted by the frames belonging to the primary AC. There

could be one or more primary destinations at any time.

6. Secondary Destinations: destinations targeted by the frames belonging to secondary ACs. There

could be one or more secondary destinations at any time. 2 Abbreviations and acronyms MU Multi-user SU Single user VHT Very high throughput 3 VHT Physical Layer This section describes the functional blocks in the physical layer.

3.1 Channelization

R3.1.A: The draft specification shall include support for 80 MHz PHY transmission. 80 MHz channels consists of two adjacent IEEE 40 MHz channels, and do not partially overlap with each other. 160 MHz channels consists of two adjacent IEEE 80 MHz channels, and do not partially overlap with each other. 80 MHz and 160 MHz channels for the US region are shown in Figure 12. Figure 12 --80 MHz and 160 MHz channels for the US region [10773r0][101064r2] 80 MHz and 160 MHz channelization for the Europe, Japan and Global operating classes tables REVmb Annex E are shown in Figure 2. Note that China does not have this band. TGac Spec Framework page 6 Robert Stacey, Intel Figure 34 --80 MHz and 160 MHz channelization for the Europe, Japan and Global operating class tables [101064r2] R3.1.B: The draft specification shall include support for 160 MHz PHY transmission. [100378r1] R3.1.C: Tone allocation for 160 MHz operation shall consist of two 80 MHz tone allocations. [100378r1] R3.1.D: The draft specification shall include support for non-contiguous 160 MHz PHY transmission whose frequency spectrum consists two segments, each transmitted using any two 11ac 80 MHz channels, possibly non-adjacent in frequency. Contiguous and non-contiguous 160 MHz devices shall be capable of transmitting and receiving frames between each other when the two segments of the non-contiguous 160 MHz device are placed in frequency to match the tone allocation of the contiguous 160 MHz device. [100378r1] A VHT STA shall be capable of transmitting and receiving frames using 20 MHz, 40 MHz, and 80 MHz channel width. Contiguous and non-contiguous 160 MHz channel width transmission and reception capability is optional. [100827r1] The primary and the secondary subchannels of the 80 MHz channel to be allocated within a 40 MHz channel. [10763r0] R3.1.E: The draft specification shall include support for an efficient channelization in China’s 5,725 ~ 5,850 MHz spectrum. [101062r2] A noncontiguous 160 MHz BSS shall be setup using any two nonadjacent 80 MHz channels on which a STA is permitted to establish an 80 MHz BSS. [101062r2]

3.2 VHT PLCP sublayer